Year	constant 2011 international $
1990	28132.7896676413
1991	26110.0570297211
1992	24832.859674566
1993	24381.3241715266
1994	25523.0847081871
1995	26721.7383541398
1996	27823.7751345822
1997	29720.3133673321
1998	31096.2908308063
1999	32738.7245086328
2000	34657.8843601246
2001	35692.113214535
2002	36333.3850959478
2003	36625.7500324309
2004	38467.6462535314
2005	39284.6947970185
2006	40933.6131090164
2007	42604.0176854481
2008	42655.5854429755
2009	39370.0512062984
2010	40389.3741890092
2011	40867.8618684383
2012	40120.246497552
2013	39563.4502312884
2014	39372.34276002
2015	39472.5568071086
2016	40609.2675194148
2017	41191.4917741248
2018	41814.2263198357